Reporting mercury

Hi staff team. Today, when the PvP was on, I encountered mercury and tried to kill him, I almost got him killed and he used /fly to escape. I am pretty sure when operators are engaged in combat, they're not allowed to use any boosting commands from what I know. I even got a screenshot as a proof. Please take actions.

first i only hit u once with my fist and u hit me with a diamond sword so i bailed
and tbh i was on empty invintroy with no armor so when you hit me with a diamond sword i flew away
if flying not allowed then should i stay and let him kill me cos u cant spawn in item for pvp so i cnat make dia armor
to protect myself
If u lose 5 heart or more i'll apologise
But if i give u less then 5 hearts of damadge i didnt "nearly killed" you
Maybe server log will show how much i damage u